package com.chnagli06.method_more;

import java.util.Scanner;

public class PassObj {
    public static void main(String[] args) {
        PassObj p = new PassObj();
        Circle c = new Circle();
        Scanner sc = new Scanner(System.in);
        int time = sc.nextInt();
        p.printAreas(c,time);
    }
    public void printAreas(Circle c,int time){
        for(int i=1;i<=time;i++){
            c.CaculateArea(i);
        }
    }
}
class Circle {
    int radius;
    public void CaculateArea(int r){
        this.radius = r;
        double  area = r * r*Math.PI;
        System.out.println(area);
    }
}
